• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device (100) for the treatment of a metal part (1) having an external surface (1-1), comprising: - an enclosure (11), - a vibration module (12) comprising A generator (12-1) of an ultrasonic frequency electrical signal; a converter (12-2) for converting said electrical signal into a mechanical vibration, said mechanical vibration being transmitted to a sonotrode (12-4); ▪ the sonotrode (12-4) positioned in said chamber facing the outer surface of the metal part, - projectiles (13) placed in the chamber to impact the outer surface of the metal part, said projectiles being set in motion by the vibration of the sonotrode and comprising a plurality of abrasive media which, moved by the vibration of the sonotrode, introduce residual compression stresses and improve the surface state of the metal part.
    公开号:FR3061055A1
    申请号:FR1663372
    申请日:2016-12-26
    公开日:2018-06-29
    发明作者:Amelie Morancais；Laurianne Besson；Nathalie Dang；Christian Sok
    申请人:Safran Aircraft Engines SAS；
    IPC主号:
    专利说明:

    @ Holder (s): SAFRAN AIRCRAFT ENGINES.
    ©) Extension request (s): ® Agent (s): CABINET CAMUS LEBKIRI Limited liability company.
    FR 3 061 055 - A1 ® DEVICE FOR THE TREATMENT OF AN ASSOCIATED PROJECTILE PART.
    (® The invention relates to a device (100) for the treatment of a metal part (1) having an external surface (1-1), comprising:
    - an enclosure (11),
    - a vibration module (12) comprising:
    a generator (12-1) of an electrical signal at ultrasonic frequency, a converter (12-2) for converting said electrical signal into a mechanical vibration, said mechanical vibration being transmitted to a sonotrode (12-4), the sonotrode ( 12-4) positioned in said enclosure opposite the external surface of the metal part,
    - Projectiles (13) placed in the enclosure to impac-ter the external surface of the metal part, said projectiles being set in motion by the vibration of the sonotrode and comprising a plurality of abrasive media which, set in motion by the vibration of the sonotrode, introduce residual compressive stresses and improve the surface condition of the metal part.
    METAL, METHOD AND ASSEMBLY OF
    11-3 1—. > 1-1ll-HÎWï ------- 12-4 100— ^ 11-1-- '! H12-, ü 30 l —11-2R / 12-3

    DEVICE FOR THE TREATMENT OF A METAL PART,
    METHOD AND ASSEMBLY OF ASSOCIATED PROJECTILES
    TECHNICAL FIELD OF THE INVENTION
    The invention relates to the treatment of metallic parts and more particularly a device making it possible to reduce the processing time of said metallic parts.
    TECHNOLOGICAL BACKGROUND OF THE INVENTION
    In order to improve the mechanical performance of certain metal parts, and in particular their surface properties, it is known to use mechanical surface treatment techniques such as shot peening and / or tribofinishing which allow, respectively, to modify the structure. and the surface condition of said metal parts.
    Conventional or ultrasonic shot blasting introduces residual compressive stresses in order to improve the mechanical resistance of metal parts. More particularly, it is a question of projecting at high speed steel, glass or ceramic balls onto the surface of a metal part so that said metal part undergoes deformation over a small thickness. Patent applications FR no. 2873609, FR no. 2815280, FR no. 2815281 thus describe methods of peening metal parts.
    Tribofinishing enables the surface finishing of metal parts to be completed by polishing, deburring, shelving, smoothing, etc. To do this, the metal parts to be treated are immersed in a vibrating tank containing a mixture of abrasive media and a liquid (water, oil, additives). The friction of the metal parts with the abrasive mixture makes it possible to ensure the polishing, to deburr and to break the angles of said metal parts.
    In the majority of cases, these two techniques are used successively in the production chain. Thus, the processing of metal parts is long and requires numerous checks of said metal parts.
    GENERAL DESCRIPTION OF THE INVENTION
    The invention thus provides a solution making it possible to reduce the number of operations and controls of the metal parts and consequently the processing time of said metal parts.
    The invention according to a first aspect relates to a device for the treatment of a metal part having an external surface, said device comprising:
    - a speaker,
    - a vibration module comprising:
    a generator of an electrical signal at ultrasonic frequency, a converter for converting said electrical signal into a mechanical vibration, said mechanical vibration being transmitted to a sonotrode, the sonotrode positioned in the enclosure facing the external surface of the metal part,
    - projectiles placed in the enclosure to impact the external surface of the metal part, said projectiles being set in motion by the vibration of the sonotrode.
    In addition, the projectiles include a plurality of abrasive media which, set in motion by the vibration of the sonotrode, introduce residual compressive stresses and improve the surface condition of the metal part.
    By “abrasive media” is meant an element of variable shape generally comprising a base and a hard abrasive load which uses other materials softer than this material.
    By "improving the surface finish", we mean polishing, deburring, breaking the corners of the metal part.
    The device for treating a metal part according to the invention makes it possible to solve the problems previously mentioned.
    Such a device makes it possible to reduce the processing time of metal parts by reducing the number of operations and the number of checks.
    Indeed, the device of the invention makes it possible, using a single machine, to carry out an operation ensuring both shot peening and finishing of the metal part. More specifically, the device of the invention is similar to the ultrasonic shot blasting machines according to the prior art, with the difference that the projectiles which usually comprise ceramic, glass or steel balls are replaced by projectiles comprising abrasive media used in classic tribofinishing techniques.
    By choosing the optimal couple of projectiles (shape, material, size) / parameters of the electrical signal (frequency, amplitude, duration of emission), it is possible to obtain the same result as using two different machines as is the case in the prior art. Indeed, the projectile / electrical signal parameters couple is chosen so that the projectiles have enough speed to introduce residual compressive stresses into the metal part while improving the surface condition of said metal part.
    In addition, the use of the device according to the invention makes it possible to reduce the number of inspections of metal parts since only one inspection is necessary after the treatment of the part, which further reduces the time for treating the parts.
    Finally, the streamlining of the production chain reduces the production cost of metal parts.
    In addition to the characteristics which have just been mentioned in the preceding paragraph, the device according to the first aspect may have one or more complementary characteristics among the following, considered individually or according to all technically possible combinations.
    According to a nonlimiting embodiment, the device comprises a suction system sucking residues from the metal part and projectile residues resulting from the impact of said projectiles between themselves and said projectiles on the external surface of the metal part.
    According to a nonlimiting embodiment, the device includes a filter allowing the passage of residues from the metal part and projectile residues from the enclosure to the suction system.
    According to a nonlimiting embodiment, the abrasive media have a thickness in the range [0.8 mm, 10 mm],
    According to a nonlimiting embodiment, at least one abrasive medium from the plurality of abrasive media comprises a base made of one of the following materials:
    - plastic,
    - ceramic,
    - organic.
    According to a nonlimiting embodiment, that at least one abrasive medium of the plurality of abrasive media has an abrasive load having a hardness in the range [8Mohs, 10Mohs]
    According to a nonlimiting embodiment, the abrasive load consists of at least one of the following compounds:
    - corundum,
    - alumina,
    - boron nitride,
    - silicon carbide,
    - boron carbide,
    - diamond.
    According to a nonlimiting embodiment, that at least one abrasive medium from the plurality of abrasive media has one of the following shapes:
    - cylindrical,
    - spherical,
    - pyramidal,
    - conical.
    According to a nonlimiting embodiment, the electrical signal is emitted at an ultrasonic frequency in the interval [15 kHz, 60 kHz],
    According to a nonlimiting embodiment, the amplitude of the sonotrode is in the interval [10pm, 300pm],
    According to a second aspect, the invention relates to a method for the treatment of a metal part, comprising the steps of:
    placing of projectiles in an enclosure, said projectiles comprising a plurality of abrasive media,
    - positioning of a metal part to be treated against an upper end of the enclosure so that an external surface of the metal part is facing an upper surface of a sonotrode of a vibration module,
    - emission of a sinusoidal electrical signal according to a frequency, an amplitude and for a predetermined duration by means of a generator of the vibration module,
    generation of vibrations of the sonotrode by means of a converter of the vibration module coupled to said sonotrode, said converter converting the electrical signal emitted by the generator into a mechanical vibration transmitted to the sonotrode for setting in motion the projectiles which introduce residual compression stresses and improve the surface condition of the metal part.
    According to a third aspect, the invention relates to a set of projectiles comprising a plurality of abrasive media, said set of projectiles being used in a shot-blasting process to introduce residual compressive stresses into a metal part.
    The invention and its different applications will be better understood on reading the description which follows and on examining the accompanying figures.
    BRIEF DESCRIPTION OF THE FIGURES
    The figures are presented only as an indication and in no way limit the invention.
    The figures show:
    - in FIG. 1, a diagram representing a device for processing a metal part according to a first embodiment of the invention,
    - in FIG. 2, a diagram representing a device for processing a metal part according to a second embodiment of the invention,
    in FIG. 3, a diagram representing a device for processing a metal part according to a third embodiment of the invention,
    - In Figure 4, a diagram representative of the steps of a method of treating the metal part according to an embodiment of the invention.
    DETAILED DESCRIPTION OF AT LEAST ONE EMBODIMENT OF
    THE INVENTION
    Unless otherwise specified, the same element appearing in different figures has a unique reference.
    The invention relates to a device 100 for the treatment of a metal part 1 comprising an external surface 1-1, the invention making it possible, in a single operation, to carry out both the compression (shot blasting) and the finishing of the metal part 1.
    FIG. 1 represents the device 100 for processing a metal part 1 according to a first embodiment of the invention. With reference to FIG. 1, the device 100 comprises:
    - an enclosure 11,
    - a vibration module 12,
    - projectiles 13.
    The enclosure 11 is intended to receive the abrasive media 13 for treating the metal part 1. Thus, the enclosure 11 has a side wall 11-1 delimiting said enclosure 11. In addition, the side wall 11-1 has a lower end 11-2 and an upper end 11-3 open. The metal part 1 is positioned against the upper end 11-3 of the enclosure 11 blocking said upper end 11-
    3. It is noted that the metal part 1 is kept fixed to the upper end 11-3 of the enclosure 11 so that said metal part 1 is not likely to move during the treatment. In addition, the vibration module 12 is positioned at the lower end 11-2 of the enclosure 11 blocking said lower end 11-
    2. Thus, when the metal part 1 and the vibration module 12 are positioned respectively at the upper end 11-3 and the lower end 11-2, the enclosure 11 forms a closed enclosure so that the projectiles 13 cannot escape from said enclosure 11.
    The vibration module 12 includes:
    - a generator 12-1,
    - a 12-2 converter,
    - an amplifier 12-3,
    - a 12-4 sonotrode.
    The generator 12-1 is intended to produce a sinusoidal electrical signal at ultrasonic frequency. According to a nonlimiting embodiment, the ultrasonic frequency of the electrical signal is in the interval [15 kHz, 60 kHz]. In addition, according to a nonlimiting embodiment, the amplitude of the sonotrode 12-4 is included in the interval [10 pm, 300 pm]. In addition, according to a nonlimiting embodiment, the electrical signal is emitted for a period ranging from [a few minutes to a few hours]. According to a non-limiting embodiment, the electrical signal 12-1 is emitted during a first duration di at a first frequency f1 and at a first amplitude A1 then, during a second duration d2 at a second frequency f2 and at a second amplitude A2.
    The converter 12-2 is intended to convert the sinusoidal electrical signal at ultrasonic frequency emitted by the generator 12-1 into a mechanical wave. For example, the converter 12-2 is a piezoelectric transducer.
    The amplifier 12-3, called in English "booster", is intended to amplify the amplitude of the mechanical wave generated by the piezoelectric transducer 12-2. The amplifier 12-3 is connected to the sonotrode 12-4 so that the amplified mechanical wave is transmitted to the sonotrode 12-4 which vibrates.
    The 12-4 sonotrode is intended to set projectiles 13 in motion to project them against the external surface 1-1 of the metal part 1. More specifically, the 12-4 sonotrode has a vibrating surface corresponding to the upper end of said 12-4 horn. The upper end of the sonotrode 12-4 forms the bottom of the enclosure 11 when the sonotrode 12-4 at the lower end 11-2 of the enclosure 11.
    The projectiles 13 are intended to be projected against the external surface 1-1 of the metal part 1. The projectiles 13 acquire their kinetic energy thanks to the vibrations of the sonotrode 12-4. The impact of the projectiles 13 against the external surface 1-1 of the metal part 1 makes it possible to improve the surface condition and to induce residual compressive stresses in said metal part 1. To do this, the projectiles 13 comprise a plurality of abrasive media. The random movement of the projectiles 13 in the volume of the enclosure 11 ensures uniform treatment of the area of the metal part 1.
    In addition, according to a non-limiting embodiment, each abrasive medium comprises a base and an abrasive load. Thus, according to a non-limiting embodiment, at least one abrasive medium comprises a base made of plastic, ceramic, or even in an organic material. In addition, according to a non-limiting embodiment, the abrasive load is chosen so as to be harder than the material of the metal part 1. To do this, the abrasive load has a hardness in the range [8Mohs, 10Mohs], The abrasive load consists, for example, of corundum, alumina, boron nitride, silicon carbide, boron carbide, or even diamond. Furthermore, at least one abrasive medium of the plurality of abrasive media has a cylindrical, spherical, pyramidal or even conical shape. It should be noted that the thickness, the shape and the material of the abrasive media are chosen according to the characteristics of the metal part 1 to be treated. In addition, different types of abrasive media (shape, abrasive load, base, thickness) can be used for the treatment of the metal part 1. Thus, for example, for areas with low accessibility, abrasive media of thin thickness will be preferred . Furthermore, according to another non-limiting embodiment, glass or ceramic balls are used together with the abrasive media to treat the metal part 1.
    It is noted that according to an embodiment not shown, the device 100 comprises at least two sonotrodes 12-4, each sonotrode 12-4 being equipped with an enclosure
    11. Such a device 100 makes it possible to treat several metal parts 1 simultaneously using a single generator 12-1.
    FIG. 2 represents the device 100 for processing a metal part 1 according to a second embodiment.
    The device 100 according to the second embodiment comprises the same elements as the device 100 described in the first embodiment with reference to the figure
    1. In addition, unlike the device 100 in FIG. 1, the device 100 according to the second embodiment includes a suction system 14 for sucking up residues from the metal part 1 and projectile residues 13 from the impact of the projectiles 13 between them and of said projectiles 13 on the external surface 1-1 of the metal part 1. Such a suction system 14 makes it possible to reduce the impact of the treatment on the material integrity of the metal parts 1 treated in due to residues liable to impede the circulation of the projectiles 13 or to become encrusted on the external surface 1-1 of the metal part 1. Thus, according to the embodiment of FIG. 2, a head 14-1 of the system suction 14 is fixed on a lower part 12-42 of the sonotrode 12-4. In this embodiment, through holes (not shown) are formed in the sonotrode 12-4 so that the residues of the metal part 1 and the projectile residues 13 resulting from the impact of the projectiles 13 between them and on the external surface 1-1 pass through said orifices to reach the head 14-1 of the suction system 14 and thus be sucked by said suction system 14.
    In addition, a filter 15, visible on section AA, is positioned in the enclosure 11 to allow only the passage of the residues of the metal part 1 and the projectile residues 13 of the enclosure 11 towards the suction system 14 Thus, the projectiles 13 which are still "whole" are blocked by the filter 15 so that they are not sucked in by the suction system 14. In the embodiment presented in FIG. 2, the filter 15 is positioned on an upper surface 12-41 of the sonotrode 12-4 so that only the residues of the metal part 1 and the residues of the projectiles 13 can pass through the orifices formed in the sonotrode 12-4. To do this, the size of the pores of the filter 15 is in the range [0.4 mm, 5 mm],
    FIG. 3 represents the device 100 for processing a metal part 1 according to a third embodiment.
    The device 100 according to the third embodiment comprises the same elements as the device 100 described in the second embodiment with reference to FIG. 2. In addition, unlike the device 100 of FIG. 2, the head 14-1 of the suction system 14 of the device 100 according to the third embodiment is fixed to an opening 11-11 formed in the side wall 11-1 of the enclosure 11. It is noted that in this embodiment, the sonotrode 12- 4 has no through holes. In addition, the filter 15, visible on section AA of Figure 3, is positioned at the opening 11-11 formed in the side wall 11-1 of the enclosure 11, between the head 14-1 of the system 14 and enclosure 11.
    Furthermore, according to an embodiment not shown, part of the metal part 1 is protected by a protective element attached to said part 1 or to the device 100 so that said part is not damaged by impacts from projectiles 13.
    FIG. 4 represents steps of a method 200 for treating a metal part 1 according to an embodiment of the invention. The method 200 is implemented by the device 100 for processing a metal part 1 described above.
    According to a first step 201, the projectiles 13, comprising a plurality of abrasive media, are placed in the enclosure 11. It is noted that the shape (s) (cylindrical, pyramidal etc.), the material (s) (x) and the size (s) of the abrasive media are chosen according to the material, the initial surface condition as well as the requirements in terms of the metal part 1 to be treated.
    According to a second step 202, the metal part 1 is positioned against the upper end 11-3 of the enclosure 11 so that the external surface 1-1 to be treated of the metal part 1 is positioned opposite the upper surface 12 -41 of the sonotrode 12-4. The metal part 1 and the sonotrode 12-4 are positioned respectively against the upper end 11-3 and the lower end 11-1 of the enclosure 11. It is noted that, according to a non-limiting embodiment, the part metal 1 is fixed on the upper end 11 -3 of the enclosure 11 so as to prevent said metal part 1 from moving during the treatment under the impact of the projectiles 13.
    According to a third step 203, the generator 12-1 emits a sinusoidal electrical signal at a frequency, an amplitude and for a predetermined duration according to the characteristics of the metal part 1 to be treated.
    According to a fourth step 204, vibrations of the sonotrode 12-4 are generated by means of the converter 12-2 coupled to said sonotrode 12-4. It will be recalled that the converter 12-2 converts the electrical signal emitted by the generator 12-1 into a mechanical vibration which is transmitted to the sonotrode 12-4. The vibration of the sonotrode 12-4 ensures the movement of the projectiles 13 in the enclosure 11 which makes it possible to introduce residual compression stresses and to improve the surface condition of the metal part 1.
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. Device (100) for the treatment of a metal part (1) having an external surface (1-1), said device (100) comprising:
    - an enclosure (11),
    - a vibration module (12) comprising:
    a generator (12-1) of an electrical signal at ultrasonic frequency, a converter (12-2) for converting said electrical signal into a mechanical vibration, said mechanical vibration being transmitted to a sonotrode (12-4), the sonotrode ( 12-4) positioned in said enclosure (11) facing the external surface (1-1) of the metal part (1),
    - projectiles (13) placed in the enclosure (11) to impact the external surface (1-1) of the metal part (1), said projectiles (13) being set in motion by the vibration of the sonotrode (12- 4), said device (100) being characterized in that the projectiles (13) comprise a plurality of abrasive media which, set in motion by the vibration of the sonotrode (12-4), introduce residual compressive stresses and improve the 'surface condition of the metal part (1).
    [2" id="c-fr-0002]
    2. Device (100) for the treatment of a metal part (1) according to the preceding claim, characterized in that it comprises a suction system (14) sucking residues from the metal part (1) and residues projectiles (13) resulting from the impact of said projectiles (13) between them and on the external surface (1-1) of the metal part (1).
    [3" id="c-fr-0003]
    3. Device (100) for the treatment of a metal part (1) according to the preceding claim, characterized in that it comprises a filter (15) allowing only the passage of residues from the metal part (1) and residues projectiles (13) from the enclosure (11) to the suction system (14).
    [4" id="c-fr-0004]
    4. Device (100) for the treatment of a metal part (1) according to any one of the preceding claims, characterized in that the abrasive media have a thickness lying in the interval [0.8mm, 10mm],
    [5" id="c-fr-0005]
    5. Device (100) for the treatment of a metal part (1) according to any one of the preceding claims, characterized in that at least one abrasive medium of the plurality of abrasive media comprises a base made of one of the materials following:
    - plastic,
    - ceramic,
    - organic.
    [6" id="c-fr-0006]
    6. Device (100) for the treatment of a metal part (1) according to any one of the preceding claims, characterized in that at least one abrasive medium of the plurality of abrasive media comprises an abrasive load having a hardness included in the meantime [8Mohs, 10Mohs],
    [7" id="c-fr-0007]
    7. Device (100) for the treatment of a metal part (1) according to the preceding claim, characterized in that the abrasive load consists of at least one of the following compounds:
    - corundum,
    - alumina,
    - boron nitride,
    - silicon carbide,
    - boron carbide,
    - diamond.
    [8" id="c-fr-0008]
    8. Device (100) for the treatment of a metal part (1) according to any one of the preceding claims, characterized in that at least one abrasive medium from the plurality of abrasive media has one of the following shapes:
    - cylindrical,
    - spherical,
    - pyramidal,
    - conical.
    [9" id="c-fr-0009]
    9. Device (100) for the treatment of a metal part (1) according to any one of the preceding claims, characterized in that the electrical signal is emitted at an ultrasonic frequency comprised in the interval [15 kHz, 60 kHz ],
    [10" id="c-fr-0010]
    10. Device (100) for the treatment of a metal part (1) according to any one of the preceding claims, characterized in that the amplitude of the sonotrode (12-4) is in the interval [10 pm , 300 pm],
    [11" id="c-fr-0011]
    11. Method (200) for the treatment of a metal part (1), characterized in that it comprises the steps of:
    - placement (201) of projectiles (13) in an enclosure (11), said projectiles (13) comprising a plurality of abrasive media,
    - Positioning (202) of a metal part (1) to be treated against an upper end (11-3) of the enclosure (11) so that an external surface (1-1) of the metal part (1) either facing an upper surface (12-41) of a sonotrode (12-4) of a vibration module (12),
    - emission (203) of a sinusoidal electrical signal at a frequency, an amplitude and for a predetermined duration by means of a generator (12-1) of the vibration module (12),
    - generation (204) of vibrations of the sonotrode (12-4) by means of a converter (12-2) of the vibration module (12-2) coupled to said sonotrode (12-4), said converter (12- 2) converting the electrical signal emitted by the generator (12-1) into a mechanical vibration transmitted to the sonotrode (12-4) for setting in motion the projectiles (13) which introduce residual compressive stresses and improve the state surface of the metal part (1).
    [12" id="c-fr-0012]
    12. Set of projectiles (13) comprising a plurality of abrasive media, characterized in that said set of projectiles (13) is used in a shot-blasting process to introduce residual compressive stresses into a metal part (1).
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    FR2815280B1|2000-10-12|2003-01-03|Sonats Soc Des Nouvelles Appli|SHOT BLASTING MACHINE AND METHOD|
    FR2815281B1|2000-10-12|2003-01-03|Sonats Soc Des Nouvelles Appli|BLASTING METHOD AND MACHINE FOR CARRYING OUT SUCH A METHOD|
    CN105821406B|2012-04-09|2018-08-10|天津大学|Application of the ultrasonic shot peening in Alloying on Metal Planes|CN111941226A|2020-07-08|2020-11-17|无锡天夏超声设备有限公司|Ultrasonic shot blasting structure|
    CN112157596A|2020-09-10|2021-01-01|太原理工大学|Acoustic-magnetic coupling cavitation auxiliary liquid jet polishing device and using method thereof|
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    法律状态:
    2017-11-20| PLFP| Fee payment|Year of fee payment: 2 |
    2018-06-29| PLSC| Publication of the preliminary search report|Effective date: 20180629 |
    2019-11-20| PLFP| Fee payment|Year of fee payment: 4 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 5 |
    2021-11-18| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1663372A|FR3061055B1|2016-12-26|2016-12-26|DEVICE FOR PROCESSING A METAL PIECE, METHOD AND ASSEMBLY OF PROJECTILES THEREFOR|
    FR1663372|2016-12-26|FR1663372A| FR3061055B1|2016-12-26|2016-12-26|DEVICE FOR PROCESSING A METAL PIECE, METHOD AND ASSEMBLY OF PROJECTILES THEREFOR|
    PCT/FR2017/053837| WO2018122523A1|2016-12-26|2017-12-22|Device and method for treating a metal part|
    US16/473,539| US20200122296A1|2016-12-26|2017-12-22|Device and method for treating a metal part|
    EP17838053.1A| EP3558586A1|2016-12-26|2017-12-22|Device and method for treating a metal part|
    JP2019534868A| JP2020503182A|2016-12-26|2017-12-22|Apparatus and method for processing metal parts|
    CN201780083591.5A| CN110177651B|2016-12-26|2017-12-22|Device and method for treating metal parts|
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